inet.cc revision 1078 
1/*
2 * Copyright (c) 2002-2003 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sstream>
30#include <string>
31
32#include "base/cprintf.hh"
33#include "sim/host.hh"
34#include "base/inet.hh"
35
36using namespace std;
37string
38eaddr_string(const uint8_t a[6])
39{
40    stringstream stream;
41    ccprintf(stream, "%x:%x:%x:%x:%x:%x", a[0], a[1], a[2], a[3], a[4], a[5]);
42
43    return stream.str();
44}
45
46uint16_t
47IpHdr::ip_cksum() const
48{
49    uint16_t sum = ip_cksum_add(this, hlen(), 0);
50    return ip_cksum_carry(sum);
51}
52
53uint16_t
54IpHdr::tu_cksum() const
55{
56    uint16_t sum = ip_cksum_add(payload(), len() - hlen(), 0);
57    sum = ip_cksum_add(&ip_src, 4, sum);
58    sum = ip_cksum_add(&ip_dst, 4, sum);
59    sum += htons(ip_p + ip_len);
60    return ip_cksum_carry(sum);
61}
62